Information About Trisomy 15

(also known as Chromosome 15, Trisomy 15Q)

Trisomy 15 is caused by an extra copy of part of chromosome 15 (15q) in each cell. It is extremely rare. The chromosomal disorder is characterized by growth delays before and/or after birth; mental retardation; and/or distinctive malformations of the head and facial area. Additional abnormalities typically include an unusually short neck, malformations of the fingers and/or toes; scoliosis and/or other skeletal deformities; genital abnormalities, particularly in boys; and/or, in some cases, heart defects. The range and severity of Trisomy 15 varies from case to case.

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